From the online documentation for the Kindle Fire HD we know that Flash content is not supported on Kindle Fire HD. It has nothing do to with Amazon and Android - it is Adobe’s decision. Mobile devices are loosing Flash, and the Kindle Fire HD isn't the only one. No new tablet with the newer versions of Android will support Flash Player. This seems ridiculous, because 75% of the internet still uses flash videos. But it’s just how it is. There are ways to get around it, though, using certain browsers.
If you have any problems when enjoying videos on Kindle Fire HD 7"/8.9", pls refer to
Viewing Flash content on Kindle Fire HD using Amazon Silk web browser
Amazon Silk web browser does support flash, and it's just turned off by default. If you see a message to install Flash while using your Kindle Fire HD, this means that the content you are attempting to view is a Flash file. If you would like to open the file, you will need to enable Flash through your Silk Settings menu.
With the Amazon Silk web browser open, tap the menu icon at the bottom of the screen, then tap Settings. Tap the arrow next to Enable Flash and select your preferred behavior: "Always on," "On demand," or "Off."
If you haven't updated your Kindle Fire to the latest software version available, this setting can be accessed by tapping "Enable plug-ins." To update your Kindle Fire to the latest software version, visit http://www.amazon.com/kindlesoftwareupdates
How to watch downloaded FLV and F4V flash videos on Fire HD?
If you downloaded a lot of videos (.flv, .f4v) on the Internet (YouTube, etc.) and want to watch them on your Kindle Fire HD, you will need a Flash Video Converter for Fire HD. That’s where Pavtube Video Converter comes in and the following guide shows you how.
The steps to convert FLV/F4V flash videos to MP4 for Kindle Fire HD
1. Free download Pavtube Video Converter, install and launch it as a Flash Video Converter for Fire HD. When its main interface appears, click “Add video” or “Add from folder” icon to load your source FLV/F4V videos.
Note: If you would like to combine selected tasks into one file, you can tick off the checkbox of “Merge into one file”.
2. Select output format for Kindle Fire HD
Pavtube Video Converter for Mac comes with optimal preset for Amazon Fire HD. You can simply select this profile as output from:
Format menu > Android > Amazon Kindle Fire HD H.264 (*.mp4)
Note: If you can not find the “Amazon Kindle Fire HD H.264 (*.mp4)” profile in the current version of Pavtube Video Converter you are using, you can download a profile patch here.
3. Custom output file quality for viewing on Kindle Fire HD (Optional)
The “Amazon Kindle Fire HD H.264 (*.mp4)” profile uses the following A/V settings by default:
Video Bitrate: 1500 kbps
Frame Rate: Original
Sample Rate: 44100 hz,
Audio bit rate: 128000 bps
Audio Channels: Stereo
Generally speaking, these default settings will generate files that best suited for viewing on Fire HD. If you have higher expectations on the final output files, you can click “Settings” button and go to “Profile Settings” window to adjust audio and video parameters depending on your requirements.
If you would like to generate 1080p files for Kindle Fire HD 8.9-inch, you can change the video size to 1920*1080; if you prefer to get 720p videos for Kindle Fire HD 7”, you can reset the video resolution to 1280*720. Plus, you can also adjust the video bit rate higher than 1500 kbps to acquire much sharper image quality. Keep in mind that the higher quality, the larger file size.
4. Rewrap flash video to MP4 for Kindle Fire HD
Click “Convert” button to start encoding your downloaded FLV/F4V flash videos to H.264 MP4 for Amazon Kindle Fire HD. Once the conversion completes, you can click “Open” button to get the generated MP4 files for transferring to Kindle Fire HD for viewing whenever you want.
More related articles
How to upload and play 1080p MKV movies on my Kindle Fire HD?
Are you able to download already existing AVI onto Kindle Fire HD?
How to transcode VOB files to watch them on Amazon Kindle Fire HD?
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